Microstructure, properties and hot workability of M300 grade maraging steel

Defence Technology

B. Nageswara Rao¹  N.T.B.N. Koundinya²  K.V.A. Chakravarthi³  S.V.S. Narayana Murty³ 

[1] Department of Mechanical Engineering, K L University, Green Fields, Vaddeswaram, Guntur 522 502, India;Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology, Madras, Chennai 600 036, India;Materials and Mechanical Entity, Vikram Sarabhai Space Centre, Trivandrum 695 022, India;

关键词: Activation energy;    Constitutive relation;    Hot deformation;    M300 grade maraging steel;    Processing map;   

DOI  :  10.1016/j.dt.2017.09.001

来源: DOAJ

【 摘 要 】

This paper presents isothermal uniaxial compression test results of M300 grade maraging steel over a wide range of temperatures (900–1200 °C) and strain rates (0.001–100s−1) to examine hot deformability and concurrent microstructural evolution. Processing map is generated and indicated the optimum processing parameters in the temperature range of 1125°-1200 °C and strain rate range of 0.001–0.1 s−1. High values of the efficiency of power dissipation, microstructural observations and EBSD results indicate softening mechanism to be the occurrence of dynamic recrystallisation. Material constants in a constitutive relation are evaluated from the flow stress data useful in computer modelling.

【 授权许可】

Unknown